Prefer warn_message_seconds and warn deprecated

Author: BobDotCom

discord/http.py

@@ -58,7 +58,7 @@
     NotFound,
 )
 from .gateway import DiscordClientWebSocketResponse
-from .utils import MISSING
+from .utils import MISSING, warn_deprecated
 
 _log = logging.getLogger(__name__)
 
@@ -862,10 +862,16 @@ def ban(
         )
         params = {}
 
-        if delete_message_days:
-            params["delete_message_days"] = delete_message_days
-        elif delete_message_seconds:
+        if delete_message_seconds:
             params["delete_message_seconds"] = delete_message_seconds
+        elif delete_message_days:
+            warn_deprecated(
+                "delete_message_days"
+                "delete_message_seconds",
+                "2.2",
+                reference="https://github.com/discord/discord-api-docs/pull/5219",
+            )
+            params["delete_message_days"] = delete_message_days
 
         return self.request(r, params=params, reason=reason)